title: Pyrimethanil residue and dissipation in tomatoes and soil under field conditions.
abstract: A residue analytical method to detect pyrimethanil in tomatoes and soil was developed by using high-performance liquid chromatography with a diode array detector. The dissipation and residue level of pyrimethanil in tomatoes and soil were also investigated. Results showed that the average recoveries are in the range of 87.2 to 90.0 % with a relative standard difference of 2.22 to 7.61 % in tomatoes and soil. In Guangdong, Shandong, and Yunnan, the half-lives of pyrimethanil in tomatoes were 1.8, 3.6, and 4.2 days and those in soil were 4.0, 3.3, and 3.9 days, respectively. The dissipation rate of pyrimethanil in tomatoes and soil was affected by temperature, precipitation, and soil type. The terminal residue results showed that when pesticide pyrimethanil was used under the experiment design, all the results were far below the available maximum residue limits. Low residues in tomatoes and soil suggest that this pesticide is safe to use under the recommended dosage.
authors.affiliation: Public Monitoring Center for Agro-product of Guangdong Academy of Agricultural Science, Guangzhou, 510640, China.
authors.forename: Congyun
authors.initials: C
authors.lastname: Liu
authors.forename: Dahai
authors.initials: D
authors.lastname: Lu
authors.forename: Youcheng
authors.initials: Y
authors.lastname: Wang
authors.forename: Kai
authors.initials: K
authors.lastname: Wan
authors.forename: Jianxiang
authors.initials: J
authors.lastname: Huang
authors.forename: Fuhua
authors.initials: F
authors.lastname: Wang
mesh_terms: D002681:China; D004784:Environmental Monitoring; D006207:Half-Life; D006540:Herbicides / Q000032:analysis*; D018551:Solanum lycopersicum / Q000737:chemistry*; D010573:Pesticide Residues / Q000032:analysis*; D011743:Pyrimidines / Q000032:analysis*; D012987:Soil / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D006540:Herbicides; D010573:Pesticide Residues; D011743:Pyrimidines; D012987:Soil; D012989:Soil Pollutants; C108337:pyrimethanil